Tire repair patch



May 26, 1936. R. F. WlLsoN 2,041,988

TIRE REPAIR PATCH Filed Oct. 2l. .1.935 2 Sheets-Sheet 1 5- ATTO RN EYS May 26, 1936. R. F. wlLsoN TIRE REPAIR PATCH Filed OCT.. 2l, 1955 2 Sheets-Sheet' 2 ATTORNEYS Patented May- 26, '1936 UNITED s'r-Ares 'una nEPArn PATCH Robert F. Wilson, Akron, Ohio, assignor to The 'Firestone Tire & Rubber Company,

Ohio, a corporation of Ohio Akron,

Applicatioigoctober 2 1, 1933, serial No. s94531- In some respects the invention is an improve-Y ment upon the tire patch shown in the patent l fabric are used, the patch of the present invention having a plurality of cord stripsarranged at right angles to each other. Repair-patches of the latter type as heretofore constructed contained fabric strips of various lengths and widths for the purpose pf providing the stepped or offset margins necessary to obtaining the desirable marginal thinness and flexibility.`

The chief objects of this invention'are to proa tire casing having the beads thereof spreadv `apart toillustrate the vimproved patch mounted therein; and

Figure 51s a section on the line 5-5 of /Eigure 4.-

Referring to yFigures 1 @o 3 of the drawings,

strips are of rectangular shape and are identical in size, the cords of .the respective strips being disposed longitudinally thereof. The strips are assembled in superposed relation so that the cords of each strip are disposed at right angles to the adjacent strip or strips, the assembled to Semler, No. 1,692,054, in that strips of cordvide economyA of construction in the manufacture4 Figure 1 is a plan view. of a tire repairpatchf on the line 2-2- of -Fi g-' Figure 3 is a section on thefllne of Figstrips which have their cords disposed in'the..

VSallie direction are laterally and longitudinally offset with relation to each other.- 'Ihus thecen'- ter of each vstrip is oiset from the center of the y finished structure, andthe centers of the respective strips designated III), III, II2 and IIB respectively are symmetrically disposed about'the center O of the finished structure and the latter is substantially symmetrical in shape.4 l

having a central body .portion I4 of four. ply thickness, said body portion being of such area as 'properly to cover 'an injury in a tirecasing. The strips I0- to I3 are of sufficient lengthto provide .fourtabs a, b, c and d respectively for ll securing the patch in a tire, said tabs 'being of three ply thickness adjacentthe body portion I4, two ply thickness intheir intermediate regions, and one ply thickness at their outer ends. Because of the lateral oifset of the parallel strips, 20 each tab a, b, c, d has opposite lateral marginal if portions m, of single plythickness, the intersections ofsa marginal portions forming small areas y, y of ,two ply thickness. The marginal portions :r on one side of the -tabs are of diery Vent length than those on the other side of the tabs, in which respect only the patch is not symmetrical. The patch is mounted upon a sheet of unvulcanized rubber composition I5 that is backed by a sheet of non-sticking fabric I 6.known as holland cloth. The rubber'sheet I5 and backing I6 are initially square in4 shape, as indicated by the broken lines in Figure l, and somewhat larger than that portion of the patch composed of cord strips, the four corners of the said sheet I5 and its backing being folded upon themselves so as to overlie the marginal'portions a: and 1 1 of the respective tabs a, b, c and d as shown. Strips of unvulcanized rubber- I1, I'| Ipreferably are overlaid upon the exposed edgesof the cord strips.

The manner'of applying the patch to`a' tire casing is-shown inFig-u'res 4 and5 wherein I8 designates a tire ca /sing, the bead portions ofwhich have been spread apart by members Ill,` I9 V for clearness of illustration. In Figure 5 at 20 is shown va typical injury to the tread and the fabric pliesjof atire, which injury is repaired in the usual way by filling it with cushion rubber before the patch is applied. The inside ,of the tire casing is prepared for reception ofthe repair 'patch by trimming the rough edges of the injury toprevent chang, andby applying cement tothe sur face area of the tire to be covered by the patch. I

The arrangementissuch as to provide a patch 4lIi The holland cloth is then stripped from the patch, and the latter applied to the cemented tire surface, after the cement is dry, and firmly stitched in place. In mounting the patch, the under strip I0 thereof is arranged at right angles to the cords of the inner ply of the tire, as indicated at 2 l, Figure 4, so that the plies of the body I d of the patch will alternate in the same order as the plies in the tire and will work therewith under the action of the load. Preferably the patch is vulcanized into the tire so as to become an integral part thereof.

The improved patch is octagonal in shape which facilitates mounting of the patch in a tire. There are no exposed raw edges of fabric to chafe the inner tube, and, because of its marginal flexibility, there Will be no hinge action of the tire plies about any of the edges of the patch While the tire is in service. The patch is less expensive to manufacture than plural ply patches heretofore provided, and it achieves the other advantages set out in the foregoing statement of objects.

Modification may be resorted to Without departing from the spirit of the invention or the scope of the appended claims, which are not limited wholly to the specific construction shown and described.

What is claimed is:

1. A patch for use in repairing tires, said patch f comprising a group of parallel strips of rubberized fabric of a length greater than their Width, a second group ofv parallel strips arranged at right angles to said first-named group to form a cross-shape, the parallel strips being of uniform size and offset from each other.

2. A patch for use in repairing tires, said patch comprising a plurality of parallel pairs of strips of rubberized fabric, having greater length than Width, said strips being of uniform size throughout, and the pairs of strips being arranged at right angles to the other parallel pairs of strips,

the respective parallel strips of each pair being offset from each other.

3. A patch for use in repairing tires, said patch comprising a plurality of pairs of parallel strips of rubberized cords having greater length than Width, said strips being of uniform size throughout, and the pairs of stn'ps being arranged at right angles to the other parallel pairs, the parallel strips of each pair of strips being laterally and longitudinally offset from each other.

4. A patch for use in repairing tires, said patch comprising a plurality of pairs of strips of rubberized cord fabric having greater length than Width, said pairs of strips beingarranged at right angles to the other parallel pairs of strips and having the centers of the respective strips offset from each other and symmetrically disposed about the center of the finished structure. 5. A tire repair patch comprising a plurality of strips of rubberized fabric secured together in cross formation to provide a central reinforcing pad and four anchoring ends extending therefrom, and a sheet of unvulcanizedrubber on one face thereof, the corners of the sheet between said ends being folded upon themselves and upon the lateral marginal portions of said ends to provide a rubber binding for the raw edges of the rubberized fabric.

6. A tire repair patch comprising a plurality of strips of rubberized cords of identical size and shape and laminated in cross-Wise relation to provide a central body portion and four anchor-\ ing ends extending therefrom, said ends being of graduated thickness to provide relatively thin and exible marginal portions, and a sheet of unvulcanized rubber on one face of the patch, the corners of said sheet between said ends being folded upon themselves so as to overlie the lateral marginal portions of the ends to provide a rubber binding for the raw edges of the rubberized fabric.

ROBERT F.` WILSON. 

